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P. BESNARD, Sr. &'I. E. BE SNARD, Jr. STEAM AND OTHER ENGINES.

No. 243,836. Patented July 5,1881.

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( No Model.) I 2Sheets-Shee 2.

P. BESNARD, Sr. 8: P. E. BESNARD, Jr. STEAM-AND OTHER ENGINES. I

No. 243,836. Patented July- 5,1881.

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UNITED STATES PATENT OFFICE.

PIERRE BESNARD, SR, AND FRANCOIS E. BESNARD, J R., OF NANTES, FRANCE.

STEAM AND. OTHER ENGINES.

SPECIFICATION forming part of Letters Patent No. 243,836, dated July 5, 1881.

To all whom it may concern Be it known that we, PIERRE BESNARD, Sr., and FRANCOIS EUGENE BESNARD, J r., of Nantes, in the Republic of France, have invented a certain new and useful Improvement in Steam and other Engines, of which the following is a specification.

Our invention relates to steam and other engines in which the crank-shaft is placed directly through the cylinder and piston and is fitted to a sliding box working in a transverse slideway in the piston,so that the piston acts upon the crank without the intervention of any rods or analogous devices.

The invention consists in the combination, in such an engine, with the cylinder, crankshaft, and a sliding box fitting the crank and provided upon its upper and lower faces with ribs or flanges, of a piston composed of two separable pieces bolted together and forming between them a transverse slideway for said box, and having grooves receiving the ribs or flanges thereon, all as hereinafter fully described, whereby lateral displacement of the box is prevented.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a steam-engine. Figs. 2 and 3 are central vertical sections of the same at right angles to each other. Fig. 4 is a horizontal section taken midway of the length of the cyl-- crank-shaft b, which thus passes through the.

cylinder at the middle of its length.

At one end the shaft is furnished with an eccentric-wrist, c, for working the slide-valve d, which is in a valve-chest, 6. This valve and the ports and passages forming communication between the valve-chest and the cylinder are of ordinary construction.

The piston fitting the cylinder is made in two parts, ff, in such manner that its upper part can be placed in the cylinder while the shaft is therein. These two partsare secured together by screw-bolts g passing through them. This piston has provided in it cavities h h for the working of the crank-arms z i, and

Application filed February 17, 1881. (No model.) Patented in France November 2, 1880.

a transverse slideway,j, for the reception of a The making of the piston in two pieces is advantageous, because it provides for very easily forming the slideway by planing while the two parts are separated, and the box has upon its upper and lower surfaces ribs or flanges, which enter corresponding grooves in the slideway, and thus prevent lateral movement of the box.

In its reciprocating movement the piston acts upon the sliding box to produce the revolution of the crank-wrist and the rotation of the shaft.

It will be readily understood that this on gine, dispensing with stuffing-boxes and all external connections, presents import-ant advantages.

It will also be understood that the engine may be made to serve, as desired, as a motor, a meter, or a pump for liquids or for gaseous bodies.

The two portions to a of the cylinder and corresponding portions f f of the piston may be made of dili'erent diameters, and the engine, with a proper valve or system of valves, may be made'a compound engine.

The valve or valves employed in any case may be of the sliding or any other kind.

Heretofore the piston in this class of engines has been made in two separable parts bolted together; but such feature is not broadly claimed by us.

What we claim as our invention, and desire to secure by Letters Patent, is-

The combination of the cylinder at a, the crank-shaft b, and wrist l, the sliding box k, having ribs or flanges on its upper and lower surfaces, and the piston composed of the two separable pieces ff, forming the slidewayj, in which are grooves receiving the ribs or flanges on said box k, the said members being constructed and arranged substantially as specified.

This specification signed this 19th day of January, 1881.

P. BESNARD, SENIOR, F. E. BESNARD, JUNIOR.

Witnesses A. OIRoR, F. CASTAGNARY. 

